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Re: External feedback; was Re: [motm] Stuck in a rut (help)

2007-09-24 by Richard Brewster

The MPX-1 has in input level switch to choose between Unbalanced (8 dBu 
to -14 dBu) and Balanced (+20dBu to -2dBu).  I am using the inputs 
unbalanced at the higher sensitivity, patched from my mixer effects 
sends.  I suppose I could switch to the lower sensitivity, but the MOTM 
outputs are unbalanced.  Shouldn't matter if the ring lug gets grounded 
by a patch cord, right?  The outputs are +18 dBu at max scale.  I'll 
just have to try it.  The only thing I did with the MIDI on the MPX-1 
was hook it to my keyboard MIDI out.  But I did not try using it as a 
controller for the MOTM-650.  I'll try that too.  Thanks for the ideas.

-Richard

Mark wrote:
> While I don't own an MPX-1 myself, as far as I can remember, it has
> both input and output level knobs, and -10/+4 switches in the back.
> So I don't think you would need any any sort of I/O module.  Also,
> considering that the MPX-1 can send most of its internal mod sources
> as MIDI data, you could use it with a MIDI-->CV converter to create
> LFO's, envelope followers, etc.
>
> Anyway, it wouldn't be too difficult to build a 1U triple preamp.
> Just put an attenuator before an op-amp, then you would have
> adjustable gain from "negative infinity" to whatever you gain set the amp
> (eg. 15-20 dB).  You could build it on a MUUB, MOTM breadboard, etc.
> You could even use an Oakley multimix panel if you didn't mind the
> knobs being labeled wrong.
>
> On 9/19/07, Richard Brewster put forth:
>   
>> Great!  Thanks.  I get stuck in a rut or two myself.
>>
>> About this suggestion by Robert:  I use a Lexicon MPX-1 to add effects
>> through my external mixer send and return.  Great idea to take the MPX-1
>> output and feed it back into the MOTM.  But it is at line level.  I
>> don't have an external input module yet.  This looks like another DIY
>> project.  Blacet has an input module with envelope follower, but I want
>> a stereo unit.  Ideas?
>>     
>
>

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